Dark-eyed Juncos can be found in most of North America but exist in many different sub-specie groups.  Over the past few days, I’ve spent some time photographing different types in my backyard.  Here in Kamloops the most common is the Oregon type but we also get some Slate-coloured.  In my short time here I would say Kamloops has 85% Oregon and 15% Slate-coloured.  Thankfully I don’t have to worry about juveniles at this time of year.  Below, I am going to try to show some differences but I would love to hear from people with more insight in this.